Iíve been towing a GC diesel for over 10 years. Mine is a 2007 with the Mercedes diesel with no DEF. I believe your 2014 has the Italian diesel with DEF.
Just double checking that you know the trans is more important that the engine. Only 4WD Jeep Grand Cherokees with Quadra-Trac II/Quadra-Drive II are able to be flat towed.
The GC tows like a dream with an easy setup of just popping the transfer case into neutral.
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
'17 Winnebago View 24V, '02 R-Vision B+
RVing for 20 years & 200,000+ miles